Doweling jig



G. D. LONG DOWELLING JIG May 10, 1949.

2 Shets-Sheet 1 Filed Aug. 25, 1947 'lll-l Fig. 2.

Glee/nan 0. Long B) @fl m WWW m May 10, 1949. G. 0. LONG 2,470,033

DOWELLING JIG Filed Aug. 25, 1947 2 Sheets-Sheet 2 Fig.5.

In re)! for Patented May 10, 1949 2,470,038

UNITED STATES PATENT orslcs 1.0323111? m. Gleemnn D. Loni, sterllnz. Kans- Al'ipueafilm August 25, 19. Serial N0. "0,133

3 Glam. (Gl- H -GZ) V This invention relates to new and useful impeened outwardly, as indicated at it, whereby provements and structural refinements in dowthe rods are rigidly held in place. a ing lice. and the principal object of the in- A pair of guide blocks ii areslidnbly positioned vention is to provide is devise oi the character on the rods it, said blocks heins disposed at the herein described. which may be conveniently and relatively opposite sides of the center plate I! and efleotlvely employed for guidins drills into sepabeins equidistant therefrom, as will he needs rate pieces of materiel. preparatory to the inapparent from Figures 1 and 2. w stgllstion oi dowel pins. An shait it extends through and is A. further object of the invention is to provide rotatably iourna-led inthe plates ii. l2. this a dowelling Jig which is eitremely accurate, so accomplished by oro idins the (and Wm o as to assure proper alignment of the bores or the shaft with diametrically reduced trunnions i1 apertures in which the dowel pins are to be posiwhien are rotatable in the plates ll, while the tinned. eenter'porti Another object of the invention is to provide a hushilm. is provided in the plate It.

'dowelinz iigwhieh is simple in construction. One 0! the vtrunnitms 11 projects outwardly which will readily lend itself to economical manfrom the plate Ii and carries a hand knob 'uiaotu 'e. and which may be conveniently and whereby the shaft may be easily and conveniently zifl'eegille'ly employed on various types and sizes rotated.

With the above more important objects in 20 between the rods i8. and one portion of the view. and such otherobieots as may become anshaft, disposed between the portion illand one arent as this speemoatlon proceeds. the invenoi the portions I1. is provided with s left-hand tion consists essentially of the arrangement and thread 2|, while a corresponding portion screw construction of ports as illustrated in the aooomoi the shalt on the relatively opposite side at the drawings, in which: center plate I! is provided with e right-hand Figure 1 is a top plan view of the invention: screw thread 22.

2 is a side elevation thereof: Each of the guide blocks (5 is formed with a Figure Figure 8 is a cross sectional view. taken subsorew threaded bore 28 adaptedto operntiveiy enstantlally in the plane of the line 3-4 in 118- eage one of the threaded portions (Ii, I2) oi the ur 1: so short is, by virtue of which arran ement the Figure 4 is s cm sectional view. taken subblocks II will be moved simultaneously to and stantisily in the plane oi the line H in Flsfrom the center plate it upon rotation oi the ure 1: shaft. However. it should be understoo that mo 5 i a os sections-1 view, taken the distance of the blocks from the center plate stantinliy in the plane oi the line 5-4 in Fis- 5 m equal, that is to say. the two blocks are.

1: at all times. equidistant from the center plate,

Figure 6 15 8-D end view, in the plane of regardless 0 their position with respect the the line la nals? taken m the e 0! Each oi the side plates II is provided with a clumping screw 24, equipped with an actuating Like characters oi reierenee are used to des- 1139 m 5 and hand knob 25 and with a rotatable work-engaging mm 51 i head as. the two heads as being adapted to clamp out the several views.

Referring now to the wee g dra ing; two separate pieces of work I! in position bein detail, the invention consists of a dowelinz ,5 t ee e center p te I! and t e s p tes he designated generally by the reference eharas is best shown in Figure 2. aster ill, the same embodying in its construction A plurality of drill-guiding bushings 2B, 19, of a pair oi spaced parallel side plates II and s diilerent sizes and types (to suit the work). are center plate I! disposed in spaced parallel relammmted in the guide blocks l5. and when'the tlon between the side plates, and is best shown invention isplaoedinuse, the entire ii: is clamped inFigures land 2. to the work (Tl) by means of the screws 2|, A pair oi spaced parallel guide rods ll extend whereupon the hand knob III is rotated so as to through the plates ii, I! for the purp e of 118- ediust the position oi the blocks ill with idly securing or connecting these plates together, to the oenter line it of the center plate II, this the end portions of the rode it beine flared or adjustment being, of course, governed by the on ll 0! the shatt is rotatable in a.

o ith the down Jig, the same assuming the particular position wherein the dowels are desired to be located.

'I'hereupon, an electric drill or a hand drill may be guided by the bushings 28, 29 into the work 21, and after the drilling operation is completed and the two pieces of work are placed one on top of the other, it will be observed that the dowel apertures or bores will be disposed in proper alignment. Pvhy To avoid the possible rotation of the actuating shalt l8 while the drilling operation is in progress, a set screw 3| may be provided in the plate I! for the purpose of clamping the center ppr tion II of-the shaft ii. Needless to say. a suit opening 32 may be formed in thebushingl9forthispurpose. P Also. graduated scales 33 may be iiis'crili'd on one of the guide rods i3, so that the distance I of the blocks II with respect to the center plate I! ma b e l and .c iv m .qe m siia den h seyte ei e i 1- B and min. ,n elly inell ne enmne l fifieii' fi sei e som we h er mate 1: by means r elampipg screw 3;

, pped h a ubqn. retinas -s rilly iil lii jmiuckmm. new n w Iiielit i l iibe mul 9! the r i wer we. e. w e: san s .1: 1:53 l'h'iiitibn will'b'e clear-it apparent iron} we discloslute and accordingly, a fin-the! necessary.

at this point is d'n'id ni 4 Having described the invention, what is claimedasnewis:

1. A dowelling jig comprising in combination, a. pair or side plates and a center plate dis- 1w n REFERENCES CITED he m litia; }'fifieas; a? record in the file of this patent:

UNITED S'lI'ATEBlKTW iiiiihbei ii'ij ,706392 Cgijliss "LAB;- :Hl 2,383,028 Twardowski Aug. 21-, 1945 said clamping screws mes-a 

